How to use Crohnax
Contents of the leaflet
- Leaflet attached to the packaging: patient information
- What is Crohnax and what is it used for
- Important information before using Crohnax
- How to use Crohnax
- Possible side effects
- How to store Crohnax
- Package contents and other information
Leaflet attached to the packaging: patient information
CROHNAX
250 mg
suppositories
Mesalazine
Read the leaflet carefully before using the medicine, as it contains important information for the patient.
- Keep this leaflet, so you can read it again if you need to.
- If you have any doubts, consult your doctor or pharmacist.
- This medicine has been prescribed specifically for you. Do not pass it on to others. The medicine may harm another person, even if their symptoms are the same.
- If you experience any side effects, including those not listed in this leaflet, tell your doctor or pharmacist. See section 4.
Table of contents of the leaflet
- 1. What is Crohnax and what is it used for
- 2. Important information before using Crohnax
- 3. How to use Crohnax
- 4. Possible side effects
- 5. How to store Crohnax
- 6. Package contents and other information
1. What is Crohnax and what is it used for
Crohnax is an anti-inflammatory medicine used to treat exacerbations and prevent relapses of ulcerative colitis with changes localized in the rectum.
2. Important information before using Crohnax
When not to use Crohnax
Do not use Crohnax if you have:
- hypersensitivity (allergy) to mesalazine;
- hypersensitivity (allergy) to any other component of this medicine (listed in section 6);
- hypersensitivity (allergy) to salicylic acid and its derivatives, which are contained in painkillers and used for colds;
- severe kidney or liver disorders;
- active gastric or duodenal ulcer disease;
- blood coagulation disorders. This medicine should not be used in children under 12 years of age, due to the lack of data on safety and efficacy in this age group.
Warnings and precautions
Before starting treatment with Crohnax, inform your doctor about any past or current kidney and/or liver disease, lung disease, especially asthma, and hypersensitivity (allergy) to sulfasalazine. Discuss this with your doctor before starting treatment. During treatment, your doctor may recommend blood and urine tests.
Crohnax and other medicines
Tell your doctor or pharmacist about all medicines you are currently taking or have recently taken, as well as any medicines you plan to take. In particular, inform your doctor about taking:
- medicines used to reduce blood clotting, thin the blood (coumarin derivatives, acenocoumarol);
- medicines with strong anti-allergic, anti-inflammatory effects (glucocorticosteroids);
- medicines used to treat diabetes (sulfonylurea derivatives);
- a medicine used to treat cancer, psoriasis, and rheumatoid diseases (methotrexate);
- medicines used to treat gout (probenecid or sulfinpyrazone);
- medicines with diuretic effects, lowering blood pressure (furosemide, spironolactone);
- a medicine used to treat tuberculosis (rifampicin);
- medicines used after organ transplants, suppressing the immune system (azathioprine, 6-mercaptopurine).
Pregnancy and breastfeeding
The use of Crohnax in pregnant and breastfeeding women is decided by the doctor.
Driving and operating machinery
Crohnax does not affect the ability to drive and operate machinery.
3. How to use Crohnax
Use Crohnax as directed by your doctor. The medicine is intended for rectal administration. Unless your doctor advises otherwise, use 2 suppositories (500 mg) twice a day, in the morning and evening, for exacerbations. For relapse prevention, use 1 suppository (250 mg) twice a day. The duration of treatment is determined by your doctor, usually lasting 8-12 weeks. If you have any doubts about using the medicine, consult your doctor.
Using a higher dose of Crohnax than recommended
No cases of overdose have been reported. If you take more than the recommended dose, consult your doctor or pharmacist.
Missing a dose of Crohnax
Take the missed dose as soon as possible. Do not take a double dose to make up for the missed dose.
4. Possible side effects
Like all medicines, Crohnax can cause side effects, although not everybody gets them. Common side effects (occurring in 1 to 10 people out of 100):
- nervous system disorders: dizziness;
- general disorders and administration site conditions: feeling tired, weakness, malaise.
Uncommon side effects (occurring in 1 to 10 people out of 10,000):
- gastrointestinal disorders: abdominal pain, nausea, vomiting;
- Rare side effects (occurring in less than 1 person out of 10,000):
- renal and urinary disorders: acute and chronic interstitial nephritis, renal failure;
- general disorders and administration site conditions: drug fever, skin reactions;
- skin and subcutaneous tissue disorders: hair loss;
- hepatic and biliary disorders: toxic liver damage;
- gastrointestinal disorders: acute pancreatitis;
- respiratory, thoracic, and mediastinal disorders: interstitial lung disease, bronchospasm, respiratory reactions;
- blood and lymphatic system disorders: aplastic anemia, agranulocytosis, pancytopenia, neutropenia, leukopenia, thrombocytopenia;
- cardiac disorders: myocarditis, pericarditis.
If you experience any side effects, stop using the medicine. Side effects can be reported to a healthcare professional, the marketing authorization holder, or the President of the Office for Registration of Medicinal Products, Medical Devices, and Biocidal Products, [current address, phone number, and fax, email address].
5. How to store Crohnax
Keep the medicine out of sight and reach of children. Store in a temperature below 25°C. Do not use after the expiration date stated on the packaging.
6. Package contents and other information
What Crohnax contains
The active substance of the medicine is mesalazine. The excipient is solid fat.
What Crohnax looks like and what the package contains
The medicine is in the form of suppositories packaged in blisters and a cardboard box. The package contains 30 suppositories.
Marketing authorization holder and manufacturer
Farmina sp. z o.o.
ul. Lipska 44
30-721 Kraków
Date of the last update of the leaflet:

- Country of registration
- Dosage formSuppositories, 250 mg
- ATC codeA07EC02
- Active substance
- Prescription requiredYes
- Manufacturer
- ImporterFarmina Sp. z o.o.
- This information is for reference only and does not constitute medical advice. Always consult a doctor before taking any medication. Oladoctor is not responsible for medical decisions based on this content.
- Alternatives to CrohnaxDosage form: Tablets, 250 mgActive substance: mesalazinePrescription requiredDosage form: Suppositories, 250 mgActive substance: mesalazineManufacturer: Temmler Italia S.R.L.Prescription requiredDosage form: Tablets, 500 mgActive substance: mesalazinePrescription required
Online doctors for Crohnax
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Frequently Asked Questions
Crohnax requires a prescription in Poland. You can check with a doctor online whether this medicine may be appropriate for your situation.
The active ingredient in Crohnax is mesalazine. This information helps identify medicines with the same composition but different brand names.
Crohnax is manufactured by Farmina Sp. z o.o.. Pharmacy brands and packaging may differ depending on the distributor.
Doctors such as Family doctors, Psychiatrists, Dermatologists, Cardiologists, Endocrinologists, Gastroenterologists, Pulmonologists, Nephrologists, Rheumatologists, Hematologists, Infectious disease physicians, Allergists, Geriatricians, Paediatricians, Oncologists may assess whether Crohnax is appropriate, depending on your situation and local regulations. You can book an online consultation to discuss your symptoms and possible next steps.
Spain has a well-developed healthcare infrastructure across major cities such as Madrid, Barcelona, Valencia, and Seville. Pharmacies are widely available and operate under strict regulations, ensuring access to prescribed medications.
You can buy Crohnax in Madrid, Barcelona, Seville, or Valencia at any local pharmacy with a valid prescription.
To obtain a prescription, you can use Oladoctor:
Other medicines with the same active substance (mesalazine) include Asamax 250, Asamax 250, Asamax 500. These may have different brand names or formulations but contain the same therapeutic ingredient. Always consult a doctor before switching or starting a new medicine.
















